The San Francisco 49ers recently extended reserve offensive lineman Alex Boone’s deal by four years, according to Jason La Canfora of NFL Network who cites sources with access to the contract.
The team has not announced the deal, which was completed just before Thanksgiving, but the contract has been filed with the NFL and NFL Players Association.
Boone does not start for the 49ers but they are intent on keeping depth and quality on the offensive line. The Niners gave Boone a $1.7 million signing bonus late last month and added four years to the deal — keeping the second-year pro off the free agent market.
Boone will make $450,000 in 2011, $540,000 in 2012, $950,000 in 2013 and $1.2 million in 2013. The deal also includes some escalators.